<?php
header("Content-type:text/html;charset=utf-8");
require_once'db_conn.php';
$conn;

$sql = "SELECT * FROM t_message";
$result = $conn->query($sql);
//print_r($result) ; 

//echo $result->field_cunt;
 echo "<pre>";
 //print_r($result->fetch_array());
 $rows = $result->fetch_all(MYSQLI_ASSOC);
 print_r($rows);
 foreach($rows as $value){
     echo"<br/>";
     echo $value['username'] ."说：".$value['content'];
     
 }
 
 ?>